If you have ever wondered how all those fuel nozzles at your gas station actually work…
…then you have come to the right place.
It’s a simple, yet complex, arrangement of mechanical components—linkages, valves, springs, diaphragms, seals—that work together to make these fascinating contraptions function.
How Gas Station Nozzles Work?
Let’s have a quick review of couple of concepts that we established in our physics classes, the understanding of which would be required to fully grasp the mechanics behind the functioning of agas station nozzle.
We know that a fluid flows from a high-pressure area to a low-pressure area.
We know that the pressure in vacuum is less than the atmospheric pressure.
Now that we have reviewed the essential concepts, we can press the lever on the fuel nozzle to see how the whole thing works.
As you press the lever, it opens the main poppet valve
This poppet valve allows the gasoline to flow through the body of the fuel nozzle. However, this flow only lasts for a short term. To continue to draw more gasoline through the nozzle, the contraption has to pull-in additional force to assist the gasoline flow. That is where the design of the device helps itself.
The initial flow of gasoline causes an anti-drain valve to move downwards
The downward movement of the valve, creates a low-pressure area within the fuel nozzle. This low-pressure area is connected to the spout of the gas pump nozzle via a tube—the point of insertion being a small hole present at the bottom of spout. This hole is exposed to the external environment, allowing air to enter.
When the vacuum is created, the resulting pressure drop causes air to flow from the small hole, all the way through the tube and into the vacuum space. There it mixes with gasoline, and the flow of air causes gasoline to maintain its own flow.
This flow continues until the gasoline level in the fuel tank reaches a certain point
At this point, the filled gasoline covers the small hole through which the air has been entering. When the hole is covered, instead of air, gasoline starts flowing through it and all the way up to the vacuum space.
Since gasoline is denser than air, the pressure changes in the vacuum space. This pressure change causes a diaphragm to be sucked, which then shuts off the main poppet valve. Consequently, the gasoline supply from the mains is cut off.
And this is how the fuel nozzles at your gas station works.
Want to Buy a New Fuel Nozzle for Your Gas Station?
We stock high quality branded fuel nozzles. All our products come with manufacturer’s warranty and along with fuel nozzles, we also provide other petroleum equipment supplies for your gas station. Check out our expansive inventory of products.
Not only will you save big on every day prices but enter the code FREEFRT* in the Coupon Code box on the Shipping Information page when you check out and we will ship all qualifying products for F-R-E-E!
The temperatures may be falling but the specials are HOT, HOT, HOT!!
*Free Freight applies only for those qualifying products on the Web Specials page and limited to a maximum of (1) case quantity on nozzles. If you buy qualifying and non-qualifying products on the same order, we will remove freight charges for all qualifying products to reduce your overall freight charge but you MUST enter the coupon code FREEFRT. The shipping charges you see for any qualifying products when you check out online will be reduced/removed when we receive your order confirmation prior to the finalized billing of your credit card / PayPal account and prior to your order being physically shipped so what you see online for shipping charge WILL be reduced/removed!
We reserve the right to limit quantities.
REMEMBER, you MUST enter the coupon code: FREEFRT when checking out on the Shipping information page to take advantage of the free freight offer.
Feel free to contact us at 1.800.238.1225 with any questions about this offer.
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